Deep Constraints on [CII]158$μ$m in JADES-GS-z14-0: Further Evidence for a Galaxy with Low Gas Content at z=14.2
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866917910542286848 |
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| author | Schouws, Sander Bouwens, Rychard J. Algera, Hiddo Smit, Renske Kumari, Nimisha Rowland, Lucie E. van Leeuwen, Ivana Sommovigo, Laura Ferrara, Andrea Oesch, Pascal A. Ormerod, Katherine Stefanon, Mauro Herard-Demanche, Thomas Hodge, Jacqueline Fudamoto, Yoshinobu Röttgering, Huub van der Werf, Paul |
| author_facet | Schouws, Sander Bouwens, Rychard J. Algera, Hiddo Smit, Renske Kumari, Nimisha Rowland, Lucie E. van Leeuwen, Ivana Sommovigo, Laura Ferrara, Andrea Oesch, Pascal A. Ormerod, Katherine Stefanon, Mauro Herard-Demanche, Thomas Hodge, Jacqueline Fudamoto, Yoshinobu Röttgering, Huub van der Werf, Paul |
| contents | We present deep ALMA observations targeting the [CII]$_{158μm}\,$ line in JADES-GS-z14-0, the most distant known galaxy at z=14.1793. We do not detect the [CII]$_{158μm}\,$ line in our deep observations, implying a luminosity of $<$6$\times10^7$ L$_{\odot}$ (3$σ$) for the target. Comparing this with the detected [OIII]$_{88μm}\,$ line, we constrain the [OIII]/[CII] ratio to be $>$3.5, significantly improving our probe of the ionization parameter $U$. The observed ratio is higher than analogues in the local universe, but consistent with galaxies at $z\approx6$-9. Through ISM modeling, we infer extreme ionizing conditions with log(U)$>-$2.0, likely requiring a young stellar population. Our modeling also indicates a relatively low gas density ($51_{-32}^{+116}$ cm$^{-3}$), significantly lower than expected from lower redshift trends. We infer a relatively high gas-phase metallicity (16$\pm$6\% solar) consistent with previous results and implying a rapid build-up of metals. Finally, using [CII]$_{158μm}\,$ as a molecular/cold gas mass tracer, we infer a low gas fraction ($f_\mathrm{gas} < 0.77$), consistent with previous estimates of the dynamical mass from [OIII]$_{88μm}\,$. Combined with the low observed gas density, lack of dust and high ionization parameter, this suggests strong feedback processes are playing an important role in the evolution of this galaxy. Our observations show that JADES-GS-z14-0 is a rapidly evolving galaxy with extreme ISM conditions, shedding light on the earliest phases of galaxy formation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_01610 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Deep Constraints on [CII]158$μ$m in JADES-GS-z14-0: Further Evidence for a Galaxy with Low Gas Content at z=14.2 Schouws, Sander Bouwens, Rychard J. Algera, Hiddo Smit, Renske Kumari, Nimisha Rowland, Lucie E. van Leeuwen, Ivana Sommovigo, Laura Ferrara, Andrea Oesch, Pascal A. Ormerod, Katherine Stefanon, Mauro Herard-Demanche, Thomas Hodge, Jacqueline Fudamoto, Yoshinobu Röttgering, Huub van der Werf, Paul Astrophysics of Galaxies We present deep ALMA observations targeting the [CII]$_{158μm}\,$ line in JADES-GS-z14-0, the most distant known galaxy at z=14.1793. We do not detect the [CII]$_{158μm}\,$ line in our deep observations, implying a luminosity of $<$6$\times10^7$ L$_{\odot}$ (3$σ$) for the target. Comparing this with the detected [OIII]$_{88μm}\,$ line, we constrain the [OIII]/[CII] ratio to be $>$3.5, significantly improving our probe of the ionization parameter $U$. The observed ratio is higher than analogues in the local universe, but consistent with galaxies at $z\approx6$-9. Through ISM modeling, we infer extreme ionizing conditions with log(U)$>-$2.0, likely requiring a young stellar population. Our modeling also indicates a relatively low gas density ($51_{-32}^{+116}$ cm$^{-3}$), significantly lower than expected from lower redshift trends. We infer a relatively high gas-phase metallicity (16$\pm$6\% solar) consistent with previous results and implying a rapid build-up of metals. Finally, using [CII]$_{158μm}\,$ as a molecular/cold gas mass tracer, we infer a low gas fraction ($f_\mathrm{gas} < 0.77$), consistent with previous estimates of the dynamical mass from [OIII]$_{88μm}\,$. Combined with the low observed gas density, lack of dust and high ionization parameter, this suggests strong feedback processes are playing an important role in the evolution of this galaxy. Our observations show that JADES-GS-z14-0 is a rapidly evolving galaxy with extreme ISM conditions, shedding light on the earliest phases of galaxy formation. |
| title | Deep Constraints on [CII]158$μ$m in JADES-GS-z14-0: Further Evidence for a Galaxy with Low Gas Content at z=14.2 |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2502.01610 |